Capacity and throughput optimization in multicell 3g. This technology does not constrict bandwidths digital signals or frequencies but spreads it over a fullyavailable spectrum or across multiple channels via division. In this paper, we present switchedbeam sb and rotatable equal sectoring res techniques for cdma cellular systems in a 2d urban environment. This protocol uses cdma access to send voice and data and signals between mobile phones and cell sites. This allows several users to share a band of frequencies see bandwidth. Udhaya sankar 3 1, 2 assistant professor, department of computer science and engineering, annapoorana engineering college, salem 3 associate professor, department of computer science and engineering, annapoorana engineering college, salem. This was done by modifying the traffic capacity equation of wideband code division multiple access wcdma model. What matters is the coverage from the cdma and gsm networks. Reference information about gsm, dect, amps, cellular cdma, iridium, wireless lans, digital audio and video broadcasting.
There is one business where i live that does it, but they arent willing to give me any info. An efficient algorithm for adaptive cell sectoring in cdma. In 1985, the fcc allocated three frequency bands to spread spectrum communications. Does anyone know where i could purchase software to unlock cdma phones. Performance analysis of umts cellular network using. Cell sectoring is another very effective method for reducing multiple access interference, where each cell is sectored by using directional antennas. Secondly, a voice traffic measurement of signal strength in a sectroization network was taken.
Prentice hall communications engineering and emerging. Multiphone gsm cdma sms software free download and. For a given network, the program first calculates the area of coverage. Capacity of cdma systems can be improved by decreasing the interference reverse link is the capacity bottleneck for 2g whereas for 3g it is the forward coverage and capacity are interrelated in cellular cdma systems soft handoff increases the capacity and coverage compared to hard handoff. Nix considered adaptive coverage for umts macro cells based on situation awareness 4. Mobility enhanced smart antenna adaptive sectoring for. Cdma frequency allocation the major capacity advantage of cdma is that it reuses the same allocated frequency in every sector of every cell. Gsm and cdma spectrum frequencies the cdma network operates in the frequency spectrum of cdma 850 mhz and 1900 mhz while the gsm network operates in the frequency spectrum of gsm 850 mhz and 1900 mhz. In the handbook of cdma system design, engineering, and optimization, leading cdma researcher dr. Time division multiple access mobile communication. The trunking e ciency of these systems decreases due to sectoring and this inturn reduces the capacity. Switching gsm phones between different networks is easier than with cdma phones. Measuring the capacity of a cdma cell site is not straightforward, and.
The mx882000c001 wcdma voice codec software option adds realtime voice encodingdecoding to the wcdma measurement software. Codedivision multiple access cdma is a channel access method used by various radio communication technologies. Handbook of cdma system design, engineering, and optimization. It does so by using the hata cost 231 propagation model. Smart cell sectorization for third generation cdma systems. The interference reduction capability of cell sectoring and power control algorithms have been considered separately as means to decrease the interference in code division multiple access cdma cellular systems. In 2010, carriers worldwide switched to lte, a 4g network that supports simultaneous voice and data use. To permit this without undue interference between the users, cdma. An efficient algorithm for adaptive cell sectoring i n cdma systems jihui zhang 1, jiangchuan liu 1, qian zhang 2, wenwu zhu 2, bo li 1, and yaqin z hang 2 1 the hong kong university of. Cdma software free download cdma top 4 download offers free software downloads for windows, mac, ios and android computers and mobile devices.
Verizon and sprint, on the other hand, use cdma, which stands for code division multiple access. Code division multiple access 2000 cdma2000 is a third generation 3g standard developed by the international telecommunication union itu. In uplink of cdma systems, the maximum number of supportable. What opportunities will i receive after purchasing. A discussion of the technical issues, concepts and solutions behind these system standards.
Start out with a detailed overview of is95 pcs and cellular cdma, including uplink and. Performance analysis of gsm coverage considering spectral efficiency, interference and cell sectoring. Rapidsoft systems executive team has been involved with cdma technologies from its inception in 1993, and brews arrival in 2001. Code division multiple access cdma is a digital cellular network standard that utilizes spreadspectrum technology. Cdma workshop is the professional powerful software service, built to task with any cdma 800, 1900, ixevdo, gsm, wcdma, lte etc smartphones, tablets, fixed terminals, data cards and more. Pdf joint centralized power control and cell sectoring. Fundamentals of the radio propagation channel, digital and analog transmission, multiple access schemes, cellular reuse, etc. Path loss for uplink and downlink has been calculated using link calculator software. It is a graphical interactive tool for analyzing the capacity of a cdma code division multiple access network and optimizing that capacity.
Unlike channelized wireless systems that assign different radio channels during a handoff called a hard handoff, spread spectrum mobiles share the same channel in every cell. The distribution is modeled as a spatial poisson process, with. Kyoung il kim and the members of technical staff of bell labs, lucent technologies bring together the fields most valuable experience and methods in a single authoritative, uptodate resource for every working cdma professional. Ccap stands for cdma capacity allocation and planning. On the other hand, sectorization increases the capacity of cdma systems. What is code division multiple access 2000 cdma2000. One important feature of the algorithm developed is that it does not depend on tracking individual mobile, but rather on the statistics of mobiles.
Brew software development, brew developers, brew cdma. Luckily, us mobile has excellent cellular coverage using the best gsm and cdma networks in the us. Cell sectorization one way to increase to subscriber capacity of a cellular network is replace the omnidirectional antenna at each base station by three or six sector antennas of 120 or 60 degrees opening each sector can be considered as a new cell, with its own set of frequency channels. Moreover, the mt8820b can measure the audio txrx without an external audio analyzer and. The interference reduction capability of cell sectoring and power control algorithms have been considered separately as means to decrease the interference in code division multiple access cdma.
New adaptive smart antenna arrays can enhance the performance of virtually any cdma system, including is95, imt2000 and wideband cdma. Cdma can be implemented in several ways, two of which are frequency hopping and direct sequencing. The uplink capacity of cdma cellular networks is improved by adaptive sectoring based on tracking of mobiles spatial distribution. Cdma is an example of multiple access, where several transmitters can send information simultaneously over a single communication channel.
It has three users, where in this setup two users are transmitting data, while one user is off. Is95 and third generation cdma applications find resources for working and learning online during covid19 prek12 education. If you want to download cdma flashing tool then follow the. Brew offers a number of key advantages over other software environments, like secure application licensing, integrated billing, and downtothemetal apis for highperformance applications. It is effective and needs the able tool for quickly and fast programming or reprogramming cdma devices to any unlocking work. Cdma ll code division multiple access explained with solved example in hindi. All it means is that verizon can pile on several people to use its network at once. Right now they are letting people download the software for free. Cellular analysis for legal professionals duke law school. In this thesis, adaptive sectoring of a cdma cellular network is investigated, and the aim is to maximize the uplink capacity by utilizing the mobiles spatial information. Artificial intelligenceai database management systemdbms software modeling and designingsmd software engineering. Cdma best server prediction map using prediction software.
Thus, there is improved voice and data communication. Whether you use a cdma or gsm network, it does not matter. Cdma workshop flashing tool dfs software free download full version for windows. Live endtoend communication tests between a handset and wcdma mobile are supported by installing the mt8820b011 audio board. Sectoring is done by simply introducing three similar radio equipments in three sectors and the reduction in mutual interference due to this arrangement translates into a 3fold increase in capacity in theory. If differs from other desktop texting software which relies on an internet sms gateway.
The fbgs in the system are working as encondersdecoders for the incoherent optical signal. All china phone platforms like mtk, spreadtrum etc. Pdf performance analysis of gsm coverage considering. Exa vector signal analyzer 9010a vsa and agilent signal studio software 28. Achim wacker, jaana laihosteffens, kari sipila, and kari heiska considered the impact of the base station sectorisation on wcdma radio network performance 3. Optical codedivision multipleaccess system ocdma the system designed in project sac ocdma.
Codedivision multiple access cdma for cellular communication networks requires the implementation of some forms of adaptive power control. The proprietary smart antenna rf modeling software tool, beamcontroller, was used to. The distribution of mobiles is modeled as a spatial poisson process, whose. When a sector is subdivided in multiple narrower spot beams switched beams or smart antennas are deployed, a common pilot channel cannot. Cdma toolbox for scilab this project provides a cdma tool box for scilab with extensive set of tools that help to simulate a cdma environment in scilab. The first procedure was to derive expressions for number of users per sector in a cdma network. The is95 code division multiple access cdma spread spectrum cellular system provides a unique handoff capability that cannot be provided with other wireless systems. With sector breathing, a congested cell is sectored at an angle of 60 or 120. It is wellknown for load balancing in code division multiple access cdma. Software modeling and designingsmd software engineering and project planningsepm.
Power consumption model of sector breathing based congestion. Smart antennas for wireless communications is the first book that brings together all the realworld data and expertise communications engineers. Joint centralized power control and cell sectoring for. Instead, use your existing mobile phonegsm cdma, gsm cdma modem or cellular terminal and connect it to the. The onestop source for engineering cdma adaptive antennas.
Understand important cdmarelated issues, including noncoherent and coherent cdma spatial processors, dynamic resectoring, and the use of spatial filtering to increase range and capacity. Free for now cdma flasher software this is a software program that dealers pay a monthly fee to flash cdma phones to page plus, cricket, and metropcs among other services. User modeling enables in the computation of the traffic density in a cellular network, which can be used to optimize the placement of base stations and radio network controllers as well as to analyze the performance of resource management algorithms towards meeting the final goal. Even in this ideal situation, there is intersector interference. Cdma, which stands for code division multiple access, is a competing cell phone service technology to gsm, on 2g and 3g networks that is gradually phasing out. Cdma code division multiple access or cdma has its roots in wwii era spread spectrum technology. In fdma and tdma systems, sectoring is done to reduce the cochannel interference. Enhanced services can be provided to cdma one subscribers through cdma2000. Cdma, centralized power control, equal sectoring, forward link, rotatable equal sectoring, switchedbeam. Development of an intelligent enhanced dynamic cell.